Figure 5
From: Evolution of resource cycling in ecosystems and individuals
Resource turbulence. For each run, we calculate for all resources the sum of absolute changes in resource abundance through time, and then sum over the resources. Thus we arrive at a single number indicating how turbulent resource dynamics have been through a run. For each selection regime the difference between the local and null model is statistically significant. For σ = 0.2, 1.0 and 5.0 the Wilcoxon rank-sum test (alternative hypothesis: local less than null) results in, respectively, p < 2.73·10-6, p < 5.97·10-8 and p < 1.38·10-12.